Model Expo, Bluejacket Ship Crafters, Loyalhanna Dockyard and MANY others have all the stuff you are looking for. The current advice on this forum, and I agree with it, is to buy these parts as you need them instead of all at once. Eyebolts, blocks, and deadeyes are good things to replace as is the rigging thread that comes with the kit...
Good luck and good hunting
Ray